Light analysis tests: do not render empty lines between classes and in the beginning

compiler/testData/codegen/light-analysis/classes/sealedInSameFile.txt

@@ -4,61 +4,50 @@ public abstract class A {
     private method <init>(p0: int): void
 }
 
-
 public final static class A/C {
     inner class A/C
     public method <init>(): void
 }
 
-
 public final class B {
     public method <init>(): void
 }
 
-
 public final class D {
     public method <init>(): void
 }
 
-
 public final class E {
     public method <init>(): void
     public method <init>(p0: int): void
 }
 
-
 public final class Q {
     public method <init>(): void
 }
 
-
 public final class S {
     public final static field INSTANCE: S
     private method <init>(): void
 }
 
-
 public final class SealedInSameFileKt {
     public final static @org.jetbrains.annotations.NotNull method box(): java.lang.String
 }
 
-
 public final class T {
     public final static field INSTANCE: T
     private method <init>(): void
 }
 
-
 public abstract class X {
     private method <init>(): void
 }
 
-
 public abstract class Y {
     private method <init>(): void
 }
 
-
 public abstract class Z {
     private method <init>(): void
 }